CN1250370C - Vertical welding method for high-strength superthick structural steel board - Google Patents
Vertical welding method for high-strength superthick structural steel board Download PDFInfo
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- CN1250370C CN1250370C CN 03141906 CN03141906A CN1250370C CN 1250370 C CN1250370 C CN 1250370C CN 03141906 CN03141906 CN 03141906 CN 03141906 A CN03141906 A CN 03141906A CN 1250370 C CN1250370 C CN 1250370C
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Abstract
The present invention relates to a vertical welding method for high-strength and ultra-thick structural steel plates, which is characterized in that the groove of abutting seams of two welded steel plates is 32 DEG. A CO2 semi-automatic welding gun is clamped and fixed on a welding gun bracket of an auxiliary welding trolley arranged on a gear track fixed along the side of a welding seam. In the welding process, the auxiliary welding trolley drives the swing control module of the welding gun to control a wire feeding mechanism to feed wires and carry out the automatic welding operation under the protection of CO2 gas when the auxiliary welding trolley directionally moves on the gear track from bottom to top. The present invention can automatically and continuously weld vertical abutting seams of high-strength steel plates of which the thickness is more than 30mm, and has the characteristics of high welding efficiency, high welding success ratio, avoidance of the influence of human factors, reduction of the consumption of welding material and manual work, relief of the labor strength of welders, safe and reliable production, etc.
Description
Technical field:
The present invention is relevant with shipbuilding, relates to the welding of high strength structure plate, the vertical welding method of super thick (greater than the 30mm) structural steel and iron peculiar to vessel of particularly a kind of high strength.
Background technology:
At present domestic to the thick high strength hull steel vertical butt joint weldering of welded plate greater than 30mm, all adopt CO
2Semi-automatic one side welding method.For guaranteeing the inherent quality of weld seam, bevel for welding is 40 °.Human factor is bigger during the operation of this welding method, and along with thickness of slab increases, the number of plies of welding, the road number is corresponding is multiplied.Between each layer, road, easily produce slag inclusion, pore, weld defect such as lack of penetration.Find weld defect as postwelding by radioscopy, there is very big difficulty in defect mending, cannot say for sure quality.The size of bevel angle is directly connected to and fills the amount of metal and the consumption in man-hour in addition.As welding job in the cabin, owing to need be preheating to 120～150 ℃ before the weldering of this steel grade.Welder's labour intensity increases greatly, is difficult to guarantee a welding fabrication.
Summary of the invention:
The technical problem to be solved in the present invention is to overcome the difficulty of above-mentioned prior art, provide the super thick structural steel and iron peculiar to vessel of a kind of high strength vertical welding method, purpose is to improve the mechanical automation degree of welding process, realizes continuous welding incessantly, improves welding efficiency; Avoid artificial factor, raising once is welded into power; Alleviate welder's labour intensity; Reduce the consumption and the expenditure of time amount of welding material; Raise labour productivity and security, reduce the amount of contraction and the deformation values of welding.
Technical solution of the present invention is as follows:
The vertical welding method of a kind of structural steel and iron is characterized in that the groove of the two steel plate abutment joints that welded is 32 °, with CO
2The semi-automatic gun clamping is on the welding gun support of a welding accessory cart, this welding accessory cart is installed on the other fixing gear track of weld seam, in the welding process, this welding accessory cart is on gear track from bottom to top in the directed movement, drives torch swinging control module control wire feeder automatic feeding and at CO
2Automatically weld under the gas shiled.
The vertical welding method of described structural steel and iron comprises the following steps:
1.. the slope is made at the edge of steel plate abutment joint, and gradient is 16 °, and the groove of two steel plate abutment joints is 32 °;
2.. the mounting teeth wheel track, draw a parallel lines with a certain distance from the bevel for welding edge on the abutment joint side, fix a gear track along this parallel lines, and cleaning track notch;
3.. liner is installed, after removing barrier such as something that gives the game away in each certain limit of axis of a weld reverse side both sides, weld reinforcement and polishing, at the weld seam exit two band irons must be installed, form and bevel for welding shape, the identical V-butt blow-out plate in gap, the groove center line of the ceramic substrate of deflection is aimed at axis of a weld, and stick on the groove back side.Settle a band iron in cushion back, this band iron must be mounted to blow-out plate termination, when liner passes through the framework opening part, utilizes the timber wedge fixed-bearing at the framework opening part, other positions magnet anchor clamps fixed-bearing;
4.. the welding accessory cart is installed, will be welded accessory cart and be installed on the gear track, CO
2The welding gun of semiautomatic welding is fixed on the welding gun support of this accessory cart, makes accessory cart along creeprail once, checks that whether the welding wire of sending in the welding gun aims at the whole piece axis of a weld, if any deviation, adjusts track to the right place;
5.. weld preheating, must be before the weldering with the preheating of weld seam both sides;
6.. the adjustment of welding accessory cart running parameter is set, and according to the structural design of weld seam, selects and adjust each knob on the accessory cart control module panel;
7.. select respective nozzles and ignition tip;
8.. welding successively.
Electrical heating is adopted in described weld preheating, is heated to 120～150 ℃ in the 100mm scope of butt welded seam both sides, and point for measuring temperature is positioned at the reverse side of heating from weld seam one side 50mm place.
Describedly require when successively welding:
1.. during the bottom welding, downward-sloping 8 °～10 ° of welding gun;
2.. bottoming shaping layer, welding current is 170～190A, voltage is 23～25V;
3.. each layer later on, welding current is 230～250A, voltage is 26～30V;
4.. the throat depth of each layer that feel secure is controlled at 4～8mm;
5.. every layer of weld seam adopts single-run welding, has only when weld width during greater than 45mm, just adopts multi-pass welding;
6.. the height of the last one deck that feels secure should be controlled at from groove face 1～1.5mm;
7.. during the welding of capping layer, downward-sloping 4～5 ° of welding gun;
The accessory cart rate of climb is slow partially;
The welding wire both sides time of staying is short partially;
Teeter speed will reduce;
8.. each road weld seam must weld out joint terminal 15～25mm during welding, forms a stairstepping;
9.. per pass weld seam postwelding could weld following one weld seam after must thoroughly removing welding slag and defective;
10.. when wind speed surpasses 2 meter per seconds, special-purpose wind-proof device is installed.
Described nozzle diameter should be according to the conical nozzle of the different bores of the A/F different choice of per pass weld seam:
During prime coat, select the conical nozzle of Φ 12 for use, and the ignition tip of adapted end face Φ 4 external diameters, other each roads adopt larger-diameter nozzle as far as possible, and corresponding adapted end face external diameter Φ 6 ignition tips, are prerequisite but should not bump bevelled edge with the nozzle outside.
Described welding accessory cart running parameter comprises;
1.. mode selection switch is set to predetermined torch swinging pattern place;
2.. according to the width adjustment width amplitude of oscillation of each road weld seam;
3.. regulate the direction control knob, welding wire is aimed at weld seam center and both sides point;
4.. stop knob about adjusting, set left and right 2 time of staying;
5.. adjust dolly speed of welding control handle,, show that from numeral the fluorescent screen shows by default speed adjustment;
6.. the carriage walking switch is upwards pulled;
7.. regulate the swing speed knob according to predetermined layer thickness, layer is thick, and slew rate is slow, and layer is thin, and slew rate is fast;
8.. adjust nozzle face and preceding layer surface distance (15～25mm scope), welding process tries not to regulate;
9.. above-mentioned action, default determine to put in place after, pull welding contactor at last, begin welding.
Technique effect of the present invention:
1. the present invention is reduced to 32 ° with the groove of two steel plate abutment joints by 40 °, and the filling metal of every meter weld seam reduces 2.4kg, has significantly reduced the consumption of welding material;
2. adopt CO
2The semi-automatic gun clamping is on the welding gun support of a welding accessory cart, the swing of the motion of welding gun and welding wire feeding mechanism is all driven and control by the welding accessory cart, overcome manually-operated shortcoming, avoided the influence of human factor, improved the once success rate of welding greatly welding quality;
3. along with the raising of mechanical automation program, welding administrative staff can control away from welding gun, and continuous welding has incessantly improved welding efficiency greatly, has alleviated the labour intensity of welding personnel greatly, has also solved the welding difficulty in the cabin;
4. probationary certificate, the present invention has reduced the amount of contraction and the deformation values of welding, helps controlling the deformation of hull, helps shortening the hull construction cycle.
Description of drawings:
Fig. 1 is a welding accessory cart swing control module schematic diagram.
Fig. 2 is the bevel for welding schematic diagram.
Fig. 3 is the wire oscillation schematic diagram.
Fig. 4 is the torch swinging pattern.
Among the figure:
1-amplitude of fluctuation selects button 2-swing speed button 3-right side to stop button
Button 5-direction control knob 6-walking release knob is stopped on 4-left side;
7-speed of travel button, 8-mode selection switch button, 9-beginning/stop button
10-welding contactor, 11-digital display screen.
The specific embodiment:
The vertical welding method of the super thick structure steel plate of high strength of the present invention is mainly used in the welding of thickness of slab at the seam of the EH32-36 steel plate vertical butt joint more than 30 millimeters.
The vertical welding method of the super thick structure steel plate of high strength of the present invention, bare bones are that the groove of the two steel plate abutment joints that welded is 32 °, with CO
2The semi-automatic gun clamping is on the welding gun support of a welding accessory cart, this welding accessory cart is installed on the other gear track of weld seam, in the welding process, this welding accessory cart is in directed from bottom to top the moving along this gear track, drive torch swinging control module control wire feeder automatic feeding, and at CO
2Automatically weld under the gas shield.
Now, specify the overall process of the vertical welding method of the present invention with the example that is welded as of high strength hull steel plate EH36 vertical butt joint seam.
Welding equipment is by CO
2Semi-automatic arc welder (welding current, wire feeder, welding gun etc.) and welding accessory cart and track are formed;
The source of welding current: the CO that exports rated current 500A in principle
2The power supply of the various models of semi-automatic arc welder all can use.
Wire feeder: on wire feeder commonly used, pointer ammeter, voltmeter are installed in addition.
The welding gun: " CO that uses east, Shanghai type
2" welding gun, and the gooseneck straightway of former welding gun added grow to 70mm, so that the welding gun support of welding accessory cart is firmly clamped.
The welding accessory cart moves on gear track by driver.The torch swinging control module is housed on the driver.
The adjusting knob of the panel of torch swinging control module as shown in Figure 1.
Welding material, welding EH32, EH36 high strength steel must adopt 3Y level CO2 welding wire.Welding wire adopts Φ 1.2, Φ 1.4 welding wires of TWE-711 or SF-3.
The vertical welding method of the present invention comprises the following steps:
1.. the slope is made at the edge of steel plate abutment joint, and gradient is 16 °, and the groove of two steel plate abutment joints is 32 °:
2.. the mounting teeth wheel track, draw a parallel lines with a certain distance from the bevel for welding edge on the abutment joint side, fix a gear track along this parallel lines, and cleaning track notch;
3.. liner is installed, remove the something that gives the game away in each 40mm scope of reverse side both sides, weld seam center, after obstacle produce such as weld reinforcement polish, at the weld seam exit two band irons are installed, form the V-butt blow-out plate identical with the gap with the bevel for welding shape, the groove center line of the ceramic substrate of deflection is aimed at axis of a weld place, and stick on the groove back side.Settle a band iron in this cushion back, this band iron must be mounted to blow-out plate termination, when liner passes through the framework opening part, utilizes this forelock liner at the framework opening part, other positions magnet anchor clamps fixed-bearing;
4.. the welding accessory cart is installed, will be welded accessory cart and be installed on the gear track, CO
2Semi-automatic gun is fixed on the welding gun support of this accessory cart; Accessory cart is creeped once from lower to upper, check that whether the welding wire of sending in the welding gun aims at whole piece weld seam center, if any deviation, adjusts track to the right place;
5.. weld preheating, must make in the 100mm scope of weld seam both sides the employing electrical heating carry out preheating before the weldering and reach 120-150 ℃, point for measuring temperature at the electrical heating reverse side from weld seam one side 50mm place;
6.. welding accessory cart running parameter is set up:
The effect of welding accessory cart, except that carriage walking control speed of welding, mainly being to regulate the various run action of welding gun in bevel for welding, is the (see figure 1) of controlling by the various knobs of regulating on the control module panel to every layer weld width, thickness, the rate of climb.
1) welding gun left and right directions control handle (5) is that the welding wire that will stretch out in the welding gun on the support is aimed at the weld gap center.
2) pendulum wide cut degree knob (1) is a width of regulating every layer of weld seam, before the weldering welding wire is adjusted to the left and right sides point of interface of every layer of welding bead and groove, sees Fig. 4.The swing amplitude peak is 50mm.
3) swing speed knob (2) mainly is to regulate the swing speed of welding wire in weld groove, with the thickness of control per pass weld seam.
4) pause knob (3,4) mainly is the welding wire time of staying when regulating welding wire and moving to both sides, and 0-3 is adjustable second.Knob (3) stops for the right side, and knob (4) stops for a left side.
5) carriage walking switch (6) upwards is upwards walking, is walking down downwards.
6) carriage walking velocity control knob (7), the speed of welding of control dolly empty wagons and welding process.
7) module controls switch (9) (beginning/stop)
8) welding gun teeter mode selection switch (8) is according to the width of weld groove shape and per pass weld seam, and the different requirements of the rate of climb, and welding gun has 4 kinds of multi-form weave modes available in groove, sees Fig. 4.
9) welding contactor (10);
10) numeral shows that there are three kinds of display modes fluorescent screen (11):
A. preset speed-when the carriage walking switch is in OFF or motor overload machine is stopped, showing.
B. continuous measurement speed-when mode selection switch is made as RUN or NO WEAVE, show.
C. attempt the motion of dolly of speed-when mode selection switch is beaten at STEP or STOP ON DWELL moving with preset speed and stop between alternately.To fluctuate in order preventing to be presented between zero velocity and the actual speed, to measure the speed of travel when being presented at each dolly step and finishing soon, this speed will continue to be shown until the little vehicle speed of another time and be adjusted, and it can provide the stable demonstration of degree of testing the speed.
7.. the selection of nozzle and ignition tip:
For improving thick plates efficient, selected bevel angle only is 32 °, therefore when each road of welding weld seam, guarantee that welding wire stretches out and fail to grow up under the prerequisite of 25mm the bore that the nozzle diameter in each road should be different according to the A/F different choice of per pass weld seam (Φ 12, Φ 14, Φ 16) conical nozzle.
1) prime coat is selected the conical nozzle of Φ 12 for use, and the ignition tip of adapted end face Φ 4 external diameters, and is unimpeded to guarantee gas flow, and the stopped nozzles hole that prevents to splash.
2) to select the principle of nozzle diameter for use be that welding gun is when swinging in groove in each road after, when electrode extension less than 25mm, during the preceding road of welding wire centrally aligned weld groove both sides point, not bumping bevelled edge with the nozzle outside is prerequisite, adopt larger-diameter nozzle as far as possible, and corresponding increase ignition tip end face outside dimension.
8.. welding successively:
When 1) bottom welds, downward-sloping 8 °～10 ° of welding gun;
2) bottoming shaping layer, welding current is 170～190A, voltage is 23～25V;
3) each layer after, welding current is controlled at 230～250A, voltage 26～30V (regulating the arc voltage that adapts according to electrode extension);
4) the feel secure throat depth of each layer is controlled at 4～8mm, generally welds not too many variation of electric current, voltage of each layer, substantially regulates, and by changing the both sides time of staying, swing speed and carriage walking speed are regulated layer thickness.
5) every layer of weld seam adopts single-run welding, has only and just adopt multi-pass welding when weld width is above above 45mm;
6) height of the last one deck of prime coat must be controlled in groove face 1～1.5mm scope;
When 7) the capping layer welds, downward-sloping 4 °～5 ° of welding gun;
It is slow partially that the accessory cart rate of climb is wanted;
The welding wire both sides time of staying is short partially;
Teeter speed suitably reduces.
Each road weld seam must weld out joint terminal 15～25mm when 8) welding, and forms a stairstepping;
9) per pass weld seam postwelding thoroughly after removing welding slag and the defective, could weld following one weld seam;
10) when wind speed surpasses 2 meter per seconds, special-purpose wind-proof device is installed.
The present invention has following advantages through probationary certificate:
1. the present invention is reduced to 32 °, the filling of every meter weld seam with the groove of two steel plate abutment joints by 40 ° Metal reduces 2.4kg, has greatly reduced the consumption of welding material;
2. adopt CO2Semi-automatic gun is clamping on the welding gun support of a welding accessory cart, welding gun Motion and the swing of welding wire feeding mechanism all driven and control by the welding accessory cart, overcome artificial The shortcoming of operation has been avoided the impact of human factor welding quality, has greatly improved welding once Success rate;
3. along with the raising of mechanical automation program, the welding manage personnel can control away from welding gun, can be not Discontinuously continuous welding has improved welding efficiency greatly, has greatly alleviated the labour intensity of welding personnel, Also solved the welding difficulty in the cabin;
4. the present invention can carry out the Automatic continuous welding to the high strength structure plate that thickness surpasses 30mm, And amount of contraction and the deformation values of welding are littler, are conducive to control the deformation of hull, are conducive to shorten hull Construction period.
Claims (6)
1, a kind of vertical welding method that is applicable to the structural steel and iron of the super thick structure steel plate of high intensity for ship is characterized in that the groove of the two steel plate abutment joints that welded is 32 °, with CO
2The semi-automatic gun clamping is on the welding gun support of a welding accessory cart, this welding accessory cart is installed in along on the other fixing gear track of weld seam, in the welding process, this welding accessory cart drives torch swinging control module control wire feeder automatic feeding and at CO on gear track from bottom to top in the directed movement
2Automatically weld under the gas shiled.
2, the vertical welding method of structural steel and iron according to claim 1 is characterized in that comprising the following steps:
1.. the slope is made at the edge of steel plate abutment joint, and gradient is 16 °;
2.. the mounting teeth wheel track, draw a parallel lines with a certain distance from the bevel for welding edge on the abutment joint side, fix a gear track along this parallel lines, and cleaning track notch;
3.. liner is installed, remove the something that gives the game away in each certain limit of axis of a weld reverse side both sides, barriers such as weld reinforcement and polish after, at the weld seam exit two band irons must be installed, form and the bevel for welding shape, the V-butt blow-out plate that the gap is identical, the groove center line of the ceramic substrate of deflection is aimed at axis of a weld and is placed, and stick on the groove back side, settle a band iron in cushion back, this band iron must be mounted to blow-out plate termination, when liner passes through the framework opening part, utilize the timber wedge fixed-bearing at the framework opening part, other positions magnet anchor clamps fixed-bearing;
4.. the welding accessory cart is installed, will be welded accessory cart and be installed on the gear track, CO
2The welding gun of semiautomatic welding is fixed on the welding gun support of this accessory cart; Make accessory cart once, check that whether the welding wire of sending in the welding gun aims at whole piece weld seam center, if any deviation, adjusts track to the right place along creeprail;
5.. weld preheating, must be before the weldering with the preheating of weld seam both sides;
6.. the adjustment of welding accessory cart running parameter is set, and according to the structural design of weld seam, selects and adjust each knob on the accessory cart control module panel;
7.. select respective nozzles and ignition tip;
8.. welding successively.
3, the vertical welding method of structural steel and iron according to claim 2 is characterized in that described weld preheating employing electrical heating, is heated to 120～150 ℃ in the 100mm scope of butt welded seam both sides, and point for measuring temperature is positioned at the reverse side of heating from weld seam one side 50mm place.
4, the vertical welding method of structural steel and iron according to claim 2 is characterized in that describedly requiring when successively welding:
1.. during the bottom welding, downward-sloping 8 °～10 ° of welding gun;
2.. bottoming shaping layer, welding current is 170～190A, voltage is 23～25V;
3.. each layer later on, welding current is 230～250A, voltage is 26～30V;
4.. the throat depth of each layer that feel secure is controlled at 4～8mm;
5.. every layer of weld seam adopts single-run welding, has only when weld width during greater than 45mm, just adopts multi-pass welding;
6.. the height of the last one deck that feels secure should be controlled at from groove face 1～1.5mm;
7.. during the welding of capping layer, downward-sloping 4 °～5 ° of welding gun;
The accessory cart rate of climb is slow partially;
The welding wire both sides time of staying is short partially;
Teeter speed will reduce;
8.. each road weld seam must weld out joint terminal 15～25mm during welding, forms a stairstepping;
9.. per pass weld seam postwelding, thoroughly after removing welding slag and the defective, could weld following one weld seam;
10.. when wind speed surpasses 2 meter per seconds, special-purpose wind-proof device is installed.
5, the vertical welding method of structural steel and iron according to claim 2 is characterized in that described nozzle diameter should be according to the conical nozzle of the different bores of the A/F different choice of per pass weld seam:
During prime coat, select the conical nozzle of Φ 12 for use, and the ignition tip of adapted end face Φ 4 external diameters, other each roads adopt larger-diameter nozzle as far as possible, and corresponding adapted end face external diameter Φ 6 ignition tips, are prerequisite but should not bump bevelled edge with the nozzle outside.
6, the vertical welding method of structural steel and iron according to claim 2 is characterized in that described welding accessory cart running parameter, comprising:
1.. mode selection switch (8) is set to predetermined torch swinging pattern place;
2.. according to the width adjustment width amplitude of oscillation (1) of each road weld seam;
3.. regulate direction control handle (5), welding wire is aimed at weld seam center and both sides point;
4.. stop knob (3), (4) about adjusting, set left and right 2 time of staying;
5.. adjust dolly speed of welding control handle (7),, show that from numeral fluorescent screen (11) shows by default speed adjustment;
6.. carriage walking switch (6) is upwards pulled;
7.. regulate swing speed knob (2) according to predetermined layer thickness, layer is thick, and slew rate is slow, and layer is thin, and slew rate is fast;
8.. adjusting nozzle face and preceding layer surface distance is that (15～25mm), welding process tries not to regulate;
9.. above-mentioned action is pulled welding contactor (10) after presetting and determining to put in place at last, begins welding.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 03141906 CN1250370C (en) | 2003-07-29 | 2003-07-29 | Vertical welding method for high-strength superthick structural steel board |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 03141906 CN1250370C (en) | 2003-07-29 | 2003-07-29 | Vertical welding method for high-strength superthick structural steel board |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1490118A CN1490118A (en) | 2004-04-21 |
| CN1250370C true CN1250370C (en) | 2006-04-12 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN 03141906 Expired - Lifetime CN1250370C (en) | 2003-07-29 | 2003-07-29 | Vertical welding method for high-strength superthick structural steel board |
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Families Citing this family (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102029458B (en) * | 2010-12-01 | 2012-10-10 | 武昌船舶重工有限责任公司 | Butt welding technique of steel crossbar for high-strength ship body structure |
| CN102029457B (en) * | 2010-12-01 | 2012-10-03 | 武昌船舶重工有限责任公司 | Vertical butt welding process of high-strength steel for ship structures |
| CN102009253A (en) * | 2010-12-01 | 2011-04-13 | 武昌船舶重工有限责任公司 | Transverse welding technical method for high-strength steel for ship structure |
| CN102416544A (en) * | 2010-12-08 | 2012-04-18 | 昆山市瑞捷精密模具有限公司 | Vertical welding jig for external corners |
| CN104511695A (en) * | 2014-11-26 | 2015-04-15 | 中色十二冶金建设有限公司 | Electrolyzer tank body vertical weld welding method and device |
| CN104985284A (en) * | 2015-06-30 | 2015-10-21 | 苏州华日金菱机械有限公司 | Double-wire electrogas welding machine |
| CN106799534A (en) * | 2015-11-25 | 2017-06-06 | 上海船厂船舶有限公司 | Slope board automatic soldering method |
| CN105436662A (en) * | 2015-11-30 | 2016-03-30 | 茂名重力石化机械制造有限公司 | Diaphragm seal weld joint welding machine for heat exchanger and welding method |
| CN111843122A (en) * | 2020-06-02 | 2020-10-30 | 海洋石油工程（青岛）有限公司 | Novel welding process method for connecting joint of branch pipe and main pipe of ocean engineering steel structure |
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2003
- 2003-07-29 CN CN 03141906 patent/CN1250370C/en not_active Expired - Lifetime
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Granted publication date: 20060412 |